Exide / Inverter — inverter became us still under warranty

Address:

North 24 Parganas, West Bengal

sir, I Ranjan Kanjilal purchased one exide battery INVA SAFE and with that one inverter model no.800VA HUPS/12V Sr No. U1b[protected] on 14 jul 2010.now i m posting this complain from chennai. i m here for my job.but my family is available at there barrackpore.ii purchased that inverter from Sovabazar EXIDE showroom.That time they told me that service eng will come in two weeks to check the servicibility.but no one came .two weeks before my wife suddenly hard one sound from inverter and found that out put supply of current was stopped and "OVERLOAD' word is comming in inverter screen and the top cover of inverter was became very hot.that time input supply was there and blinking of recharge was going on. in that time normal electric supply was available.she informed to customer care next day . they came and within 15mintues they made it serviceble.
after they went very next day my wife found that again the cover of the inverter became hot and 'overload ' was seen in screen of inverter.she has done once switch on/off then suddenly it starts work.
people those who came for repair they told that due to fan stopped running the inverter became hot.
now yesterday on 17th jun 11 at around 7 pm my wife once again hard one small sound from inverter and when she reach near to the inverter found smoke is comming from the inverter.top cover also became heated heavily.
now it is my kind request to u that as my family is staying along with my small daughter at home in barrackpore pls change the preesnt inverter set immediately by replacing with the new one.pls do not do any repair on the present inverter at home in quick nature.because it is still under warrarenty period and manufacture defect is occured.if any thing goes wrong then nobody will be there to help them out specially in night.
my full home address is appended below.

Mrs Mitun Kanjilal
A/79 , Patulia govt qtrs.
rly station - titagarh/barrackpore
po-patulia,titagarh.
dist - 24pgs (n)
west bengal -700119.
mob no. [protected]